The map, which is part of a larger project to preserve the cemetery, identifies each of the cemetery’s 933 grave markers with a blue pointer that users can click on to see a picture of the grave stone, the material used to make it and any text visible on the marker.

The oldest markers in the cemetery date back to 1666, but historians believe that burials have been taking place in the cemetery since the 1620s.

Notable people buried in Hancock Cemetery include the patriot Josiah Quincy, Henry Adams - the great-great grandfather of John Adams - and Reverend John Hancock, the father of John Hancock.